/*
 *
 * Copyright (c) 2006-2020, Speedment, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); You may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.speedment.runtime.field.internal.predicate.string;

import com.speedment.runtime.field.internal.predicate.AbstractFieldPredicate;
import com.speedment.runtime.field.trait.HasReferenceValue;

import static com.speedment.runtime.field.predicate.PredicateType.IS_EMPTY;

/**
 *
 * @param <ENTITY> the entity type
 * @param <D>      the database type
 * 
 * @author  Per Minborg
 * @since   2.2.0
 */
public final class StringIsEmptyPredicate<ENTITY, D> 
extends AbstractFieldPredicate<ENTITY, HasReferenceValue<ENTITY, D, String>> {
    
    public StringIsEmptyPredicate(
            final HasReferenceValue<ENTITY, D, String> field) {

        super(IS_EMPTY, field, entity -> {
            final String result = field.get(entity);
            return result == null || result.isEmpty();
        });
    }

    @Override
    public StringIsNotEmptyPredicate<ENTITY, D> negate() {
        return new StringIsNotEmptyPredicate<>(getField());
    }
}